# New Ticket Created by "Carl Mäsak" # Please include the string: [perl #78850] # in the subject line of all future correspondence about this issue. # <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=78850 >
<masak> rakudo: say (my @a).end <p6eval> rakudo 142d22: OUTPUT«-1» <masak> S32 says: "Returns the final subscript of the first dimension; for a one-dimensional array this simply the index of the final element." * masak submits rakudobug <masak> huh. I didn't even see the missing "is" in that second sentence before :) <jnthn> masak: huh. If there's nothing in there, what do you want it to return? <jnthn> 0 would be wrong because that'd imply there's one thing in there. <masak> jnthn: I don't know. but it's not to spec right now. <masak> jnthn: maybe Failure. <lue> but -1 could be in a list as well. <masak> lue: if you say that, you've misunderstood the purpose of .end (just like I did first time I saw it) <jnthn> masak: I think you maybe need to explain it then. :) <jnthn> masak: 'cus I suspect I'm missing something also... <masak> well, first off, let's agree on what S32 actually *says*. <masak> it says "returns the final *subscript*. <masak> an empty array has no final subscript. <masak> hence -1 is *wrong*. <jnthn> Hm <jnthn> True <jnthn> It may be a handy sentinel if you planeed to do some math on it. <masak> if S32 said "returns less than the length of the array", -1 would have been fine. <jnthn> But yeah, I can see flagging it up as a Failure is probably better. <masak> but it doesn't. <masak> so it isn't. <masak> this is why we have a spec, for precision and clarity. <masak> in this case, it's precise and clear. hence, bug. <masak> if you want -1, please use C<+...@a - 1> :) <jnthn> fairy nuff.
